Chelsea cruised to their second 4-2 victory in three days against Southampton on Tuesday to extend their lead at the top of the Premier League.

Eden Hazard broke the deadlock with a smart finish in the fifth minute, only for Oriol Romeo to bundle home an equaliser 19 minutes later.

A Gary Cahill header in first half stoppage time then restored Chelsea's lead - and it was all one-way traffic from there.

Eight minutes into the second 45 and Diego Costa headed past Fraser Forster to make it 3-1, later adding a second after some superb link-up play with Eden Hazard and Pedro.

Ryan Bertrand's late consolation will have frustrated Chelsea's defence but nevertheless, they're once again seven points ahead of Tottenham - who play Crystal Palace on Wednesday - in the title race.

One player who will have been delighted with the victory was Cahill, who returned to action after spending two nights in hospital with gastroenteritis last week.

He missed Chelsea's FA Cup semi-final victory on Saturday as a result but produced another captain's performance against Southampton.

His goal on the stroke of half-time couldn't have been more timely, with Chelsea's fans starting to grow restless at Stamford Bridge.

N'Golo Kante's cross found Marcos Alonso, who headed across the 18-yard box for Cahill to power home a header. Check it out in the video below.

However, were it not for Cahill, Diego Costa might have scored a bicycle kick.

When Cahill jumped to head the ball, the Spanish striker was midway through an acrobatic attempt to score but ended up completely missing.

Costa's reaction to the goal said it all about his frustration - he didn't make any attempt to celebrate - and Cahill has now revealed what he did afterwards.

According to the England centre-back, Costa actually tried to claim the goal for himself - no, seriously.

Asked on Sky Sports whether Costa's acrobatics distracted him, he said: "He tried to claim it after I think as well! I saw Marcos [Alonso] was going to win that and he popped a nice ball back across.

"It's one of them for a defender or any striker when the ball has been lofted over the like that - it's dying to be attacked.

"It was great timing for the second goal. We went in at half-time with our tails up and it was a big boost for us and I'm sure it deflated them."

Brilliant Like Costa, Cahill felt inclined to attack the ball, but in the end, there was only one winner.